ISO 19072-4:2019

Road vehicles - Connection interface for pyrotechnic devices, two-way and three-way connections - Part 4: Pyrotechnic device and harness connector assembly - type 2

This document defines the general minimum specifications of a type 2 two-way connection interface, linking the pyrotechnic device and harness connector built into a road vehicle.

Véhicules routiers — Interface de raccordement pour dispositifs pyrotechniques, deux voies et trois voies — Partie 4: Assemblage du dispositif pyrotechnique et du connecteur faisceau - type 2

General Information

• Status: Published
• Publication Date: 08-Aug-2019
• ICS: 43.040.10 - Electrical and electronic equipment
• Technical Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Drafting Committee: ISO/TC 22/SC 32/WG 6 - On-board electrical connections
• Current Stage: 9092 - International Standard to be revised
• Start Date: 25-Jan-2024
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO/TS 19072-4:2012 - Road vehicles - Connection interface for pyrotechnic devices, two-way and three-way connections - Part 4: Pyrotechnic device and harness connector assembly - type 2
• Effective Date: 16-Jul-2016

Overview

ISO 19072-4:2019 specifies the type 2 two-way connection interface between a pyrotechnic device (initiator/squib) and the vehicle wiring harness connector. It defines the minimum dimensional features, mechanical function and material characteristics required to ensure safe, interchangeable mating of pyrotechnic device connectors in road vehicles. The standard supports both two‑way and an optional three‑way (with ground) variant for electrostatic discharge (ESD) protection.

Key topics and technical requirements

• Scope and purpose: Minimum specifications for a type 2 pyrotechnic device and harness connector assembly to enable cross‑supplier compatibility in road vehicles.
• Dimensional features: Detailed interface dimensions for retainer, squib holder and coding/polarization keys (scoop‑proof design to avoid damage on improper mating).
• Coding & polarization: Mechanical coding keys with assigned RAL colour codes to prevent mis‑mating; multiple coding versions are defined for two‑way/three‑way connectors.
• Mechanical shorting clip (shunt): Design and functional dimensions for a metallic shorting clip used to short pyrotechnic contacts during handling/storage. Minimum shorting‑clip opening is verified at retainer level (Annex B) with a required check of at least 1.1 mm (see standard).
• Materials & plating:
  • Contact coating to meet ISO 27874 requirements (coating class not less than 0.5) and porosity ≤ 2 pores/mm² per ISO 14647.
  • Retainer plastic modulus ≥ 4 500 MPa in accordance with ISO 178.
  • Three‑way ground contact plating: tin, thickness 2–5 μm (Annex A).
• Referenced test & performance documents: ISO 19072-1 (pocket interface definition), ISO 19072-2 (test methods and general performance requirements), ISO 8092-2 and related material standards.

Applications and who uses it

ISO 19072-4:2019 is used by:

• Automotive OEMs and suppliers of airbags, seatbelt pretensioners and other pyrotechnic safety devices.
• Connector and harness manufacturers designing initiator-harness interfaces.
• Vehicle safety system engineers and quality assurance teams ensuring interchangeability and safe handling.
• Certification and compliance personnel referencing dimensional and material requirements for procurement and verification.

Practical benefits:

• Ensures compatible mating across multiple suppliers.
• Improves safety during assembly and service through standard shorting functions and ESD options.
• Reduces risk of mis‑connection via mechanical coding and polarization.

Related standards

• ISO 19072-1: Pocket interface definition
• ISO 19072-2: Test methods and general performance requirements
• ISO 8092-2: Connector definitions and test methods for vehicle wiring harnesses
• ISO 27874, ISO 14647, ISO 178: material and coating test standards

Keywords: ISO 19072-4:2019, pyrotechnic device connector, harness connector assembly, shorting clip, road vehicles, initiator connector, ESD ground contact.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 19072-4
First edition
2019-08
Road vehicles — Connection interface
for pyrotechnic devices, two-way and
three-way connections —
Part 4:
Pyrotechnic device and harness
connector assembly - type 2
Véhicules routiers — Interface de raccordement pour dispositifs
pyrotechniques, deux voies et trois voies —
Partie 4: Assemblage du dispositif pyrotechnique et du connecteur
faisceau - type 2
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensional features and performance requirements . 2
4.1 General . 2
4.2 Retainer and squib holder assembly . 3
4.3 Coding and polarization . 3
4.4 Mechanical shorting clip function . 6
4.4.1 Dimensional features and properties . 6
4.4.2 Requirements . 8
5 Material characteristics . 8
5.1 Contacts clip contact specifications . 8
5.2 Retainer . 8
Annex A (normative) Three-way (with ground) variant of the pyrotechnic device/initiator
harness connector assembly . 9
Annex B (normative) Gauge for minimum shorting clip opening .11
Bibliography .12
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
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on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
Electrical and electronic components and general system aspects.
This first edition of ISO 19072 cancels and replaces ISO/TS 19072-4:2012, which has been technically
revised.
The main changes are as follows:
— coding version IV for two-way has been removed;
— coding version IV and V for three-way has been added;
— Table 1 has been adjusted;
— there has been a dimensional review;
— Figure 5 has been added;
— Annex B has been added.
A list of all parts in the ISO 19072 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved

Introduction
Road vehicles integrate an increasing number of pyrotechnic devices contributing to occupant safety in
vehicles (for example frontal and side airbag, safety belt pre-tensioner, etc.).
Building the complete system requires a supply of various components from several different equipment
suppliers. Vehicle manufacturers need to define a common specification to ensure that connectors
designed and produced for the various equipment suppliers can be mated without any difficulty.
In the current design of this vehicle equipment, three areas of connection have been identified:
— connection between the pyrotechnic device (e.g. initiator) and the harness connector;
— connection between the tab holder and the clip holder of the harness connector; and
— connection between the harness connector and the electronic control module.
The connection between the pyrotechnic device and the harness connector is the only connection that
can be standardized and it forms the subject of this document. Due to the location of the safety device
in the vehicle, the connector design could be right angle or straight.
Due to the fact that several electrostatic discharge (ESD) protection is requested by several vehicle
manufacturers, a three-way with ground option of the pyrotechnic device/initiator harness connector
assembly is also defined (see Annex A).
...